Table 1 Electrochemical frequency modulation (EFM) and Weight loss (WL) data for T95 corrosion in 15 wt% HCl solution in the absence and presence of selected concentrations of aspartame at different temperatures.
Conc. (mM) | EFM | WL | ||||||
|---|---|---|---|---|---|---|---|---|
icorr (µA cm−2) | βa (mV dec−1) | βc (mV dec−1) | CF2 | CF3 | ηEFM | v (mm/y) | ηWL% | |
60 °C | ||||||||
0 | 182.9 | 21.3 | 27.4 | 2.114 | 3.045 | - | 26.20 ± 0.17 | - |
1.70 | 150.8 | 23.9 | 29.5 | 2.105 | 3.109 | 16 | 21.68 ± 0.17 | 17 |
6.80 | 98.7 | 36.6 | 43.2 | 1.486 | 2.015 | 46 | 13.18 ± 1.73 | 50 |
70 °C | ||||||||
0 | 167.7 | 19.1 | 23.1 | 1.254 | 3.171 | - | 60.20 ± 3.47 | - |
1.70 | 118.2 | 18.3 | 24.3 | 1.564 | 2.352 | 30 | 42.32 ± 0.17 | 30 |
6.80 | 80.3 | 21.7 | 26.7 | 2.094 | 3.416 | 52 | 25.50 ± 0.17 | 58 |
80 °C | ||||||||
0 | 166.5 | 18.6 | 23.1 | 1.19 | 2.722 | - | 106.17 ± 1.73 | - |
1.70 | 101.4 | 20.0 | 41.8 | 1.715 | 3.114 | 39 | 62.63 ± 0.17 | 41 |
6.80 | 63.1 | 19.3 | 25.3 | 2.167 | 2.916 | 62 | 39.38 ± 0.17 | 63 |
90 °C | ||||||||
0 | 165 | 19.0 | 21.9 | 2.184 | 3.287 | - | 149.54 ± 8.69 | - |
1.70 | 61 | 19.1 | 24.6 | 1.866 | 2.804 | 63 | 42.33 ± 1.73 | 72 |
6.80 | 42.5 | 19.8 | 24.4 | 1.720 | 3.186 | 74 | 21.34 ± 1.73 | 86 |
